package com.lemurian.bankdata.lite.utils;

import java.io.UnsupportedEncodingException;
import java.security.NoSuchAlgorithmException;

public class Encryption {

    public static String toHexString(byte bInput) {
        if ((bInput >= 0) && (bInput <= 15)) {
            return ("0" + Integer.toHexString((int) bInput)); //.toUpperCase();
        } else if (bInput > 15) {
            return (Integer.toHexString((int) bInput)); //.toUpperCase();
        } else {
            String sTemp = Integer.toHexString((int) bInput);
            return sTemp.substring(sTemp.length() - 2); //.toUpperCase();
        }
    }

    public static String toHexString(byte[] baInput) {
        if (baInput == null) {
            return null;
        }

        StringBuffer sbTemp = new StringBuffer();

        for (int i = 0; i < baInput.length; i++) {
            sbTemp.append(toHexString(baInput[i]));
        }

        return sbTemp.toString();
    }

    private static String convertToHex(byte[] data) {
        StringBuffer buf = new StringBuffer();
        for (int i = 0; i < data.length; i++) {
        	int halfbyte = (data[i] >>> 4) & 0x0F;
        	int two_halfs = 0;
        	do {
	            if ((0 <= halfbyte) && (halfbyte <= 9))
	                buf.append((char) ('0' + halfbyte));
	            else
	            	buf.append((char) ('a' + (halfbyte - 10)));
	            halfbyte = data[i] & 0x0F;
        	} while(two_halfs++ < 1);
        }
        return buf.toString();
    }

    public static String SHA1(String text) throws NoSuchAlgorithmException, UnsupportedEncodingException  {
        java.security.MessageDigest md;
        md = java.security.MessageDigest.getInstance("SHA-1");
        byte[] sha1hash = new byte[40];
        md.update(text.getBytes("iso-8859-1"), 0, text.length());
        sha1hash = md.digest();
        return convertToHex(sha1hash);
    }
}
